Althor's story sounds like more urban legend G-13 stuff. There are many (public) papers on cannabinoids and test results and methods from the Mississippi university, including some from Dr. Paul Mahlberg's (the expert, consultant to amongst others Mississipi uni). While they generally do not contain popular hybrid strain names like white widow or blue dream, the first link I posted does contain some info if you connect the dots. Oaxacan is from Oaxaca state in Mexico obviously, it's the sample ME-O. And, 'both ME-N and ME-A seeds came from Acapulco, Guerrero.' It's a messy page but it contains plenty of test results.
If from Mississipi uni probably not older than 1960. Good chance it's from one of these:
http://onlinelibrary.wiley.com/doi/10.1002/jps.2600600832/abstract
http://onlinelibrary.wiley.com/doi/10.1002/jps.2600620229/abstract
Referenced in Robert Connell Clarke's book and several others.
And I STILL DONT SEE where it says.. 20% THC on any strain.
Please stop showing random links of shit that doesnt show that.
I want to see a link that says something to the effect of this strain was tested in 1973 and had 20% thc at the University of Mississippi.